Nail machine



Feb. 5, 1929. r 1,701,098

E. F. BROWN NAIL MACHINE Filed June 29. 1926 3 Sheets-Sheet jnvent'or:EPW/A/ f." BEOW/V,

llitizesses Feb. 5, 1929. v 1,701,098 E. F. BROWN Y NAIL MACHINE FiledJune 29. 1926 s Sheets-Sheet 2 k\ I q h Inventor:

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lifhzesses:

E. F. BROWN NAIL MACHINE Feb. 5, 1929.

Filed June 29. 1926 3 Sheets-Sheet y .m QQMQM w M m .w m M MK. 5 n 5 mhm e \m i m f 1 N m, W 3v 5 E mu NM W Z NWHHHWWHIIIIIMHMIIHIHHIIHHHNIIM. \N p. I ..l .I/% C 5 w. Ft CL: W w V Sw4 f/ MW r 5 g m Q a V Patented Feb. 5, 1929.

UNITED STATES v 1,701,098 PATENT OFFICE.

EDWIN F. BROWN, OF CLEVELAND, OHIO, ASSIGNOR TO THE AMERICAN STEEL ANDWEE GOEPANY OF NEW JERSEY,

A CORPORATION OF NEW JERSEY.

N AIL MACHINE.

Application filed June 29,

This invention relates to nail making machines, and more particularly tothe stock or wire feeding mechanism for such machines, and has for oneof its objects the rovislon of a feeding mechanism connecte dlrectly toone of the reciprocating parts of the machine proper.

Another object is to provide a novel form, of feeding mechanism whichmay be accurately set to feed denite lengths of stock for forming thenails.

A further object is to provide a feeding mechanism for nail machineswhich may be adjusted and set while the machine is in operation.

A still further object is to provide anail making machine having thenovel comblnation, construction and design of parts hereinafterdescribed and claimed.

In the drawings-- t Figure 1. 's a plan view of a machine embodying myinvention.

Figure 2 is a fragmentary side elevation, partly in section, of themachine of Figure 1.

Figure 3 is an enlarged plan of the forward end of the machine showingthe feeding mechanism.

Figure 4 is an enlarged side elevation of the forward end of themachine.

Figure 5 is anelevation taken on the line VV of Figure 4.

Figure 6 is a' sectional elevation taken on the line VI-VI of Figure 4.

Referring more particularly to the drawings, the numeral 2designates'the bed frame of a standard form of nail making machine. Theusual power operated crank shaft 3 is journaled in bearings 4 in themachine and is provided with loose and tight pulleys 5 and 6 at one endto receive a belt from a suitable source of power (not shown). Afly-wheel 7 is mounted on-the other end of the crank shaft 3, Across-head 8 is mounted for sliding move- 'ment in the frame 2 and isadapted to be i reciprocated by a pitman 9 connected to a crank portion10 of the crank shaft 3.

A hammer holder 12 is secured to the forward free end of the cross-head8, and has a hammer 13 secured therein adapted to cooperate with thepinch dies 14 to form the nail heads.

A pair of cutters or km'ves 16 are provided for cutting off and pointingthe finished nails and a pair of operating levers 17 are 1926. SerialNo. 119,327.

provided for operating the knives 16. The levers 17 are pivoted to thebed frame at 18 and are adapted to be rocked tooperate the cutters orknives by cam surfaces 19 on the cross-head 8.

The machine thus far described is old and well-known in the art and,therefore, will not be described further in detail.

The wire stock from which the nails are formed is fed into the machinethrough a series of straightening rollers 20 and then through a wirefeeding block 21 into and through the dies 14.

The wire feeding block 21 is slidably mounted on a pair of guide rods 22mounted in the bed frame 2 and is adapted to be reciprocated by aconnecting rod 23 which has one end pivotally connected at 24 to theblock 21 and has its other end pivotally connected at 25 to a pin26'threaded into the cross-head 8. It will be understood that, ifdesired, the connecting rod 23 may be connected to the pitman 9 insteadof to the cross-head 8.

The wire feedin block 21 has a passageway or opening 2 therethrough,through which the wire passes to enter the heading dies. The block 21 isprovided with a recess 28 at one end of the passageway 27 to receive athrust plate 29, and is provided with an opening or recess 30 extendingparallel with the passageway 27 to receive a sliding wedge plate carrier31. The carrier 31 is provided with a transverse opening 32 in whichawedge plate 33 is loosely mounted so that it is free to be movedtransversely toward and away from the thrust plate 29.

A recess 34 is formed to the one side of the opening 30 opposite thewedge plate 33 to receive a wedge block 35 against which the wedge plate33 is adapted tomove when the carrier 31 is reciprocated.

The carrier 31 is provided at its forward or free end with transverselextending arms 36 which are apertured guide bolts 37 which extendthrough the apertures in arms 36 and are threaded into the block 21.Coiled springs 38 are mounted around the bolts 37 undertension and serveto normally move the carrier 31 forwardly so as to force the wedge plate33. against the wedge-block 35 and toward the thrustplate 29 so as togrip the wire.

to receive A bracket support 39 is secured to the feed 1 bracket. Thebell crank lever 40 has its one arm provided with an elongated opening41 in which a pivot pin 42, which is secured in the carrier 31, ismounted. The other arm of the bell crank lever 49 is provided with aroller, 43 adapted to be engaged by trlpplng devices to be described.

* A tripping arm 44 is secured to the frame 2 and extends forwardly overthe feeding'block 21 and into the path of the roller 43, so'that whenthe roller 43 engages the arm 44 it will rock the bell crank lever 40about its pivotal mounting and exert a force on the pivot pin 42 "tomove the carrier 31 against the tension of the springs 38.

A tripping block 45 is mounted on a bracket support 46 secured to theframe 2. The block 45 is 'slidably mounted in a guideway formed in thebracket 46, and is adapted to be moved longitudinally or toward and awayfrom the arm 44 by an adjusting screw 47 j'ournaled in the bracket 46and threaded in the block 45. A set-screw 48 is provided for locking theblock 45 in adjusted position.

The operation of the 'w1re or stock feeding mechanism is as follows:

On the forward or forging stroke of the cross-head 8 the connecting rod23 will move the feeding block 21 bodily forward, and due to the roller43 on the bell-crank 40 being under the trippin arm 44 when the movementis commence the wedge carrier 31 will have been moved rearwardly to freethe wedge plate 3. Therefore, the feeding block will move freely alongthe wire stock. When the roller 43 is moved out from under the trippinarm' 44, the springs 38 willtendto move the carrier 31 forward to forcethe wedge plate 33 to grip the wire. However, due to the fact thatduring the forward or for ing stroke of the cross-head 8 the wire stocis gripped by the gripping of pinch dies 14 and that the movement of thefeeding block is awayfrom thehigh point of the wedge block 35, the wedgeplate will not grip the wire stock but will ride freely along the same.As the forward movement of the feeding block 21 continues the roller 43will be engaged underthe tripping block 45 and the bell crank againrocked to move the carrier 31 against the tension of the springs 38 andpositively free the wedge plate 33.

On the return or rearward stroke of the cross-head 8 the connecting rod23 will move the feeding block in unison therewith. During this rearwardmovement of the block 21 the wedge plate 33 will move freely along thewire until the roller 43 moves out from under the tripping block 45 whenthe springs 38 will immediately force the carrier 31 forward so as tomove the wedge plate along the Wedge block 35 and force the wedge plate33 toward the thrust plate 29 so as to grip the wire stock between theplates 33 and 29, and cause it to be moved into the machine with thecontinued movement of. the feeding block 21. As the feeding block 21continues to move toward the machine the roller 43 will be engaged underthe tripping arm 44 so as to rock the bell crank 40 and move the carrier31 rearwardly and release the wedge plate 33 thereby stopping the feedof the wire stock and permitting the feed block 21 to move freely alongthe wire for the remainder of its stroke.

It will be apparent from the above that the wire stock is fed into themachine only while the roller 43 is not engaged under either thetripping arm 44 or block 45. Therefore, the

length of wire stock fed into the machine,

and consequently the length of the nail, is definitely determined by thelength of the s ace between the arm 44 and block 45. The b ock 45, asabove described, is adjustable to and away from the arm 44 so that thelength of the wire fed into the machine may be readily varied. Attentionis directed to the fact that. the block 45 may-be readily adjustedwithout stopping the operation of the machine to correct inaccuracies inthe length of the finished nails, thereby saving considerable time overmachines as heretofore provided,

since such machine had to be stopped in order to adjust the feedingmechanism.

While I have shown and described one spe .cific embodiment of myinvention it will be understood that I do not wish to be limitedthereto, since various modifications may be made without departing fromthe scope of my invention as defined in the appended claims.

- I claim:

1. In a nail machine having a bed frame, and nail forming dies on saidframe, a wire stock feeding mechanism including a wire feeding blockslidablymounted on said frame and having a wire passageway therethrough,means for reciprocating said block, a thrust plate mounted in said blockat one side of said passageway, a wedge carrier slidably mounted in saidblock along the other side of said passageway, a wedge block secured insaid feeding block, a wedge plate mounted in said wedge carrier andadapted to be reciprocated by said carrier so as to move along the wedgeface of said wedge block, means for normally moving said wedge carrierand wedge plate against said wedge block so as to force said wedge platetoward said thrust plate so as to grip the wire to be fed into themachine, and means for automatically moving said wedge plate in thereverse direction ad acent the extremes of themovement of said feedingblock.

2. In a nail machine having a bed frame, and nail forming dies on saidframe, a wire stock feeding mechanism including a wire feeding blockslidably mounted on said frame.

and having a. wire passageway therethrough, means for reciprocating saidblock, a thrust plate mounted in said block at one side of saidpassageway, a wedge carrier slidably'mounted in said block alongtheother side of said passageway, a wedge block securedin said feedingblock, a wedge plate mounted in said wedge carrier and adapted to bereciprocated by said carrier so as to move along the wedge face of said.wedge block, resilient means for normally moving said wedge carrier andwedge plate against said wedgeblock so as to force said wedge platetoward said thrust plate so as to ripthe wire to be fed into themachine, a bel lcrank pivotally connected to said wire feeding block andhaving one arm connected to said wedge carrier,'and means forautomatically rocking said bell crank adjacent the extremes of themovementof said feeding block so as to move said wedge car-i rier andwedge plate against thetension of said resilient means.

3. In a nail machine having a bed frame, and nail forming dies on saidframe, a wire stock feeding mechanism including a wire feeding'blockslidably mounted on said frame and having a wire passagewaytherethrough, means for reciprocating said block, a thrust plate mountedin said block at one side of said passageway, a Wedge carrier slidablymounted in said block along the other side of said passageway, a wedgeblock secured in said feeding block, a wedge plate mounted in said Wedgecarrier and adapted to be reciprocated by said carrier so as to movealong the wedge face of said wedge block, resilient means for normallymoving said wedge carrier and wedge plate against said wedge block ,1

so as to force said wedge plate toward said thrust plate so as to gripthe wire to be fed into the machine, a bell crank pivotall connected tosaid wire feeding block an having one arm connected to' said wed ecarrier, a trip ing arm secured on said bed rame and exten. ing into thepath of the .free arm of said bell crank, a tripping block supportsecured to said bed frame, a tripping block adjustably secured on saidframe and extending into the path of the free arm of said bell crank andadjustable toward or away from said tripping arm, said bell crankbeingadapted to engage and berocked by said tripping arm and block adjacentthe extremes of the movement of said feeding block so as to move. saidwedge carrier and wedge plate against the tension of said resilientmeans to ment of said feeding block, said last named means beinadjustable to vary the point at which said ell crank will be rocked.

In testimony whereof, I have hereunto signed my name.

EDWIN F. BROWN.

